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J/V/E/VTO aiiorneys w f m a J l Patented Mar. 29,1898.

A. J. SWEET.

TRACK DRILL.

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I/Il SSES (No Model.) 2 Sheets-Sheet 2. A. J. SWEET.

TRACK DRILL.

110.601,61). Patented Ma11.29,1898.

ll/IZWESSES N WM@ @am 6MM/f UNITED STATES ARTHUR J. SWEET, OF YPSILANTI, MICHIGAN, ASSIGNOR OF ONE-HALF TO HENRY P. GLOVER, OF SAME PLACE.

TRACK-DRILL.

SPECIFICATION forming part of Letters Patent No. 601,619, dated March 29, 1898.

Application filed January 1l, 1897. Serial No. 618,770. (No model.)

scription of the invention, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to track-drills, and has for its object an improved machine adapted to drill a horizontal hole through the web of a railway-rail.

The particular improvement relates to means of adjustment of the two ends of the carrying-frame whereby the drill-point may be located vertically along the face of the web and the Obliquity of the drill may be regulated at will.

In the drawings, Figure 1 shows a sideelevation. Fig. 2 is a plan view of the machine. Fig. 3 shows in detail, on an enlarged scale, the yoke and lever connections.

The frame consists of two hooked side pieces A A, the hooked ends of which, a a, are adapted to engage over the rail and hold the machine against the pressure of the tool. These side pieces A A are united by cross-bars B B C. The cross-barsB B are utilized as the supports or journal-carriers of the drill-shaft D. The cross-bar C is utilized as the support or vertical journal-carrier of a vertical shaft E, the upper end of which is supported in a journal that is supported by the cross-bar C', crossing the frame from the standard c to the standard c.

To the upper end of the shaft E is secured a miter-gear e, that engages with a second miter-gear on the horizontal shaft E. The shaft E is supported by the standards c c', and on the projecting end of it is mounted a crank-wheel W, by means of which the drill. ing mechanism is actuated.

At the lower end of the shaft E is a miterwheel cl, which meshes with the miter-wheel d', that is journaled in the cross-bar B and is hollow, so that the drill-shaft D passes through it. i

The drill-shaftD is provided wi th a featherway f, that extends longitudinally along one side and permits the shaft D to have movement through the hollow shaft of the gearwheel d and is held bya pin that engages in the feather-way from rotating independently of the gear-wheel d.

At that end of the frame which isfarthest from the hooks ct a is a secondary frame, which consists of a yoke-piece 1, a yoked lever 2, and a housing 3. The yoked lever is hinged to the main frame by fulcrum-pins 6 6 and is hinged to the yoke 1 by the pins 5 5".

The housing 3 is arranged to be adjusted to and from the yoke 1 by means of an adj usting-screw 4, which passes through the yoke, through the end of the housing 3, and engages against the rear of the drill-shaft D and enables the drill-shaft to be adjusted with reference to the main frame, so that the point of the drill may be located at the desired point with respect to the work to be done.

The entire yoke 1 and housing3 is movable and is actuated in motion by means of the lever 2; but this movement is limited in extent and the adjusting-screw is desirable as an adjunct to the reciprocating movement produced by the lever.

The collar 7 engages within the housing against the front Walls thereof and prevents the drill-shaft from escaping therefrom when the shaft is retracted.

On each side of the main frame, at points above the place where the rail will come when the machine is in operation, are ears II H, through which pass vertical adj usting-screws h h, and at each side of the main frame, near the rear, are ears H H', through which pass vertical adj listing-screws h h. The latter of these screws are preferably provided with footpieces h2 h2. By means of these four adjusting-screws the machine can be adjusted so that the point of the drill 1o will strike the web of the rail at any desired point, and the shaft D maybe placed at any desired obliquity to the web of the rail.

The operation of the drill will be evident at once from the description.

What I claim is- 1. In a track-drill, in combination with main frame adapted to be held to the track- IOO rail,a drill-shaftj0urnaled in the main frame, a secondary frame hinged to the main frame and consisting of a lever pinned to the main frame, a yoke pinned to the lever and a housing adapted to engage the end of the drillshaft, substantially as described.

2. In a track-drill, in combination with a frame adapted to hold the drill to the trackrail, adjusting screws adapted to engage against the rail and adjust the forward end of the frame vertically, rearadjusting-screws adapted to engage the ground and adjust the rear of the drill-frame vertically, substantially as described.

3. In a track-drill, in combination with a main frame adapted to be held to the trackrail, a drill-shaft journaled in the main frame, a secondary frame hinged to the main frame and consisting of an actuating-lever, a housing mediately connected to said lever, and adapted to engage the end of the drill-shaft,

and means for adjusting the housing, sub- 

